摘要
为了克服传统网络分层结构面临的非最优化及非灵活性等弊端,作者研究了跨层通信协议的基本理论、特征及其相关应用后,本文设计了一种无线网络环境下的基于有效容量的跨层协议优化方法。基于有效容量模型不仅考虑了无线通信环境中的传输时延Qo S保证问题,还兼顾了物理层传输机制与数据链路层的数据队列问题,能够作为物理层与数据链路层联合跨层优化设计的桥梁,同时作者设计了保证Qo S的功率和速率分配机制。通过OPENT Modeler仿真软件实现跨层协议模型并构建仿真场景,完成了基于有效容量的跨层协议优化方法的测试验证。结果表明:基于有效容量的跨层协议较传统分层协议在相同的Qo S指数下具有较高的有效容量;在传输延时方面,其分别较IEEE802.11和IEEE802.11e协议减少27.8%和16.9%;总之,本文提出的基于有效容量的无线通信跨层协议优化方法效果突出。
In order to solve the problems of the traditional network hierarchical structure like information non-sharing among layers and the non-optimization performance,the basic principle and application of cross- layer protocol were studied. This paper designs a cross-layer protocol optimization method in wireless network environment based on effective capacity. Cross-layer protocol based on effective capacity model not only analysis Qo S statistical time delay guarantee issue in wireless communication,but also considers the physical layer transmission mechanism as well as the data queue of data link layer,then this model can be used as the optimization bridge between physical layer and data link layer cross layer,at the same time,the author designed the allocation mechanism which guarantees Qo S power and rate. The cross-layer protocol model and the simulation scene were built in OPENT Modeler to complete the validation and test of the proposed optimization method. The results indicate that cross-layer protocol based on the effective capacity has higher effective capacity than traditional layered protocol under the same Qo S index. In the aspect of time delay,transmission delay of cross- Layer optimization method based on effective capacity is reduced by 27. 8% and16. 9% compared to IEEE 802. 11 and IEEE 802. 11 e. The encouraging results proved that the proposed cross-layer optimization method in wireless environment is effective.
出处
《激光杂志》
北大核心
2016年第4期115-121,共7页
Laser Journal
基金
天津市教委科研计划项目(20132520)
天津市普通高校教改研究计划项目(C03-0809)
